Apparatus for casting molten substances



"J. J. SAMPSON APPARATUS FOR CASTING 110mm SUBSTANCES Aug. 10

Filed March 5, 1925 2 Sheets-Sheet 1 Aug. 10 1926.

J. J. SAMPSON APPARATUS FOR GASTING IOLTEN SUBSTANCES Filed larch 5, 1925 ZSheetS-SheeZ 2 I I v mama 4.1 10, 1926.

UNITED STATES zom r. :osnm sanson, or 12mm, man in: sun.

mmrus FOR. STING IOU! SUBSTANCES.

Application fled I a-rah 5, 1925, Serial Io. 13,815, and in Great and Ireland larch 14, 18M.

This invention relates to,casting' articles from molten material and whilst primarily directed to producing seals from molten lead, it is applicable for producing articles .11-

s erally from molten metal, wax or ot er fusible substances, and has for its princi al object the utilization of compressed air or forcing the molten substance .into the 'moulds. A-further object is .to provide a l method of and means for automatically pro- I ducing the article in the finished state.

According to the invention, a compressed air pump is located in a vat containing the molten material to -be moulded, and is formed with valve controlled inlets for the stripper may be actuated in like manner, or

it maybe actuated by one of the mould parts striking against it. 1 1

The accompanying drawings showpne convenient form of the invention, in WlilCh Fig. 1 is a plan.

Fig. 2 is a sectional elevation on line 2-2.

of the parts of the mould. Fig. is a sectional elevation of the pump.

' gig. 6 is a detail of the ejector cam plate, Fi 7 isa-sectional, elevation showings mod' ed'forin of the pump shown in Fi 5. The appparatus shown comprises a ase 2 having lugs3, 3 in which is mounted a crank shaft. Thebase is further provided with bosses 5 and 6 which are provided with adjustable slide bearings 7 and 8fr peetive I 1 Q I I Th e base is further provided with a lug 9 and a facing 10 having a pair of lugs 11, 11

59 d mug 12th rein. Slidabl mountan nope e y al adjust themselves against the sides of the 43 in't .b e g$.-i J 1 h g n slide ,bar-13,one"-end of which is connected b ;a -.linki14.to the. crank in 15 of crank ft 4, and the-other'en of which is pro- I. vided with a 16.1 to the the admission of com" the cutter to sever the Fig. 3 is a sectional elevation on line Fig. 4'is an enlarged sectional elevat on levers, bein side of the hexagonal slide bar 13 is a camplate 17 formed with cam slots 18. Mounted on the facing 10 is a guide block 19 in which is slidably mounted the front die 20 and in which is secured the back die 21 and below which is slidabl mounted a knife 22. The rear end of the ront die 20 is pivotally'connected to a rod 23 slidably In 16 -of the slide bar 13, which rod is provi ed .with a compensating s rin 24 and an adjusting nut 25'. An ad usta le screw stop 26 is provided in the lug 16 and has a 100 nut 27, and the, end of. the stop is adapted to Ken ge the back end of the die 20. The kni e22 is provided at one .end

with a conical hole or poi't 28 and at the.

other endis'pivotally connected to the centre of'a'link 29 pivotally mounted by one end at 10, and connected at the s 30 to the facin other end to a s idebar 31. The slide bar 31 passes through'the bosses'5 and 6, a return spring 32 and adjusting nut 33. being provided on the end thereof.

The slide bar 31 is formed with a plate hke portion 34 having slots 35 and a notch 36 on its edge adjacent to the slide bar 13.

Below the part 34 of the slide bar 31 is a release plat'e37 formed with a curved recess 38 registering normally with the notch 36 and secured to the base 2. A spring operengageswith the releasee flate 37 slidin in its movement along the ge thereof.

part of the pawl however extends above the 9 40 the "outer endsof which are reduced and 41 and collars 42 are disposd there-' e collarsl42 being secured thereby through pins 43 on which also are arranged I 44 Mounted on pivots 45011 the base 2 are levers'46 having at one end rollers 47 working in the cam slots 18 the other'ends of the connected to the respectlve' 44. 'e rings 41 are thus arranged so as to transmit the closing action .of the.

levers 46 to the cores 40, which therefore can mounted 1n the ated pawl 39 is'mounted on the slide bar 13 1 Mountedat the end of the base- 2 and di clearing openin ejector arms 56 which pass through a guide plate 57 provided with slots 58 the guide plate being secured to the. frame 48. The end of the rack 49 is adapted to be engaged by the forward end of the forward die 20 on which a projection 59 is provided for that purpose.

Below the dies is arranged a tank or holder 60 for the molten material being suitably heated and within the tank is arranged a compressed air pump 61 mounted on vertical' slide rods 62 passing through extensions 63 of the lugs 11. The pump isadapt ed to be raised and lowered in the tank by means of the slide rods 62 the upper ends of which are provided with a cross piece 64 adustably secured thereto. 'In the center of the cross piece 64 is secured a fulcrum bolt.

65 enga ingone end of a lever 66 pivotally mounted in the lug 9 on the base 2, the other end of which lever 66 being provided with a roller 67 to engage a cam 68 on the crankshaft 4. The tank 60 is provided with a chute 69 arranged below the ejector. i

The compressed air pump 61 com rises a U-shapedtube having a cone shaped elivery nozzle 70 an air inlet valve seat 71 and ball valve 72 and an inlet 73 and ball valve 74' for the molten material. Retaining pins 75 are provided to keep the ball valves adjacent to their seatings.

I On the base 2 is also mounted an air'lvalve comprising a bodypiece 76, having a valve late 77 and a slide valve 78. An air inlet 9 is provided for coupling'to the source of compressed air and a flexible delivery pipe 80 1s connected from a port'81 in the valve plate 77 to the pump 61. The slide valve 78 is kept a ainst the valve plate 77 'by a spring 82 a justing nut 83 and washer 84 arranged on a projection 85. The valve plate 7 rests on the base 2 and forms a 'do for an operating rod 86 one end of which is formed with a hole to receive the end of the projection and the other end of which is formed with a hook or In 87 the forward end of which is sloped o An abutment piece 88 is secured to the base 2 and a return spring 89 is provided for the rod 86.

An articulated operatin arm comprising pivoted thelink 90 and positioned to engage a cam 96 on the end of the crank Shaft 4. The

link 91 passes through a bracket 97 securedto the base and is provided with a return spring 98 and collar 99. The link 92 slides in a block 100 mounted on'the base 2, and the link 93 slides onthe abutment piece 88 and is formed with a hooked end 101 to engage with the hook 87 of the valve operating rod 86.

In Fig. 7 a modified form of pump is illustrated, wherein the ball inlet valve 74 is replaced by an automatic valve 101". Said automatic valve is fitted at its upper end then from six to nine or through 90, the

slide bar 13 is drawn. backwards and with itthe front portion 20 of the die. Simultaneously the cam plate 17 fixed to it causes the core members 40 to move inwards until .the complete die is formed .at the extreme position. During this movement the cam 68 has actuated the lever 66 to raise the pump nozzle 70 until it projects into the complete die through the opening 28 in the knife 22 provided to cover the gate; With the parts in this position the valve cam 96 momentarily opens the valve 78 to admit compressed air to the pump 61 which ejects the required amount of molten lead into the die to form the required seal.

Further rotary movement of the crank shaft 4 causes the slide bar 13 to travel for wardly to open the die and simultaneously the pump 61 is lowered while the pawl 39 on the slide bar 13 momentarily engages the notch 36 in the knife slide 34 and moves the knife 22 forward to cut off the gate of the seal, the slide 34 being released by the pawl 39 as soon as it leaves the curved notch 38 in the plate 37. Continued forward movement (if the slide bar 13 causes the core members 40. to be moved clear of the die after which -lodged therein forwardly until its projectioii' '59 strikes the stripper rack 49 when the stripper arms'56 are caused to move downwards and inwards to grip the seal by entering the core poles and deliver it to a chute lIDkS 9O 91, 92 and 93 pivoted together is '59 a 1 by one end of the link 90 to a bracket 94 on the base 2. A roller 95 is provided. on

If desired the compressed air may caused to'traverse a pipe in the molten substance before entry to the pump 61' in order to pre-heat the same but usually ilmateigal in the tank 51 will be suiliciently eate the man By these means ticles are readily cast from molten sub-. stances, while said substance is completelyundercontrol and liability for the pump nozzle 70 to become blocked by the material solidifying is obviated as it is found in practicethat immediately the air pressure is re-. leased by the valve 78 as shown in Fig. 3 the.

molten material recedes from the nozzle 78 before solidification can take place.

What I claim is 1. Apparatus for casting articles from molten material comprising in combination, a tank for the material, means for heating the tank to melt the material, a compressed air pump submerged in the molten material, means for supplying compressed air to the pump to eject the material, automatic valve-controlled inlets in the pump for the molten material and forthe air, a mould arranged above the tank, and means for raising theglump into engagement with the moul for ling it with ejected molten material, as set forth.

3.. Apparatus for casting from the lead seals and other ar-r pump into engagement with .the

below engagement molten material'comprising in combination, a tank for the material, means for heating the tank to melt the material, a compressed air pump submer .in the molten material, means for supp ying compressed air to the pump to eject the material, automatic valve-controlled inlets in the pump for the molten-materialand for the air, a mould,- arranged. above the tank, consisting of a stationary'die and a movingedie, slidably mounted cores adapted to moved into and out of the mould, means for raising the mould. for it with the ejected material a knife filling said dies to cut the sprue, and means for stripping the seal from the mould, as

setforth.

4.. Apparatus for casting seals from molten material comprising a tank for the material, means for heating the tank to melt the-material, a'compressed air pump sub-. merged in the molten material, consisting of a discharge chamber, adapted to be immersed in the molten material, an outlet nozzle therefrom, an automatic float controlled terial, and a compressed air inlet having a float controlled non-return valve, means for supplying compressed air to the said pump to eject the material,'a mould, arranged above the tank, consisting of a stationary die and a moving die, slidably mounted cores ada ted to be moved into and out of the moul ,means for raising the pump into with the mould for filhng it with the ejected material, a knife below said dies to cut the sprue, and means for strip-' ping the sell from the mould. V 'In testimony whereof I have signed my to this specification.

JOHN J. SAMPSON,

non-return inlet therein for the molten ma- 

